Narrow return type of current_action/filter() (#398)

Author: IanDelMar

functionMap.php

@@ -62,6 +62,8 @@
     'check_admin_referer' => ['1|2|false', 'action' => 'string'],
     'check_ajax_referer' => ['1|2|false', 'action' => 'string'],
     'comment_class' => ['($display is true ? void : string)'],
+    'current_action' => ['non-empty-string|false'],
+    'current_filter' => ['non-empty-string|false'],
     'current_time' => ["(\$type is 'timestamp'|'U' ? int : string)"],
     'did_action' => ['int<0, max>'],
     'edit_link' => ['int<0, max>'],

tests/data/return/addslashes_gpc.php renamed to tests/data/return/addslashes-gpc.php

@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpStubs\WordPress\Core\Tests;
+
+use function current_action;
+use function PHPStan\Testing\assertType;
+
+assertType('non-empty-string|false', current_action());

tests/data/return/current-action.php

@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpStubs\WordPress\Core\Tests;
+
+use function current_filter;
+use function PHPStan\Testing\assertType;
+
+assertType('non-empty-string|false', current_filter());

tests/data/return/current-filter.php

@@ -129508,6 +129508,7 @@ function remove_all_filters($hook_name, $priority = \false)
      * @global string[] $wp_current_filter Stores the list of current filters with the current one last
      *
      * @return string Hook name of the current filter.
+     * @phpstan-return non-empty-string|false
      */
     function current_filter()
     {
@@ -129696,6 +129697,7 @@ function remove_all_actions($hook_name, $priority = \false)
      * @since 3.9.0
      *
      * @return string Hook name of the current action.
+     * @phpstan-return non-empty-string|false
      */
     function current_action()
     {